java生成带logo的二维码 Demo（测试通过）
package com.common.qr.util;
import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/**
* 提供二维码生成和解析工具类
* @author Administrator
*
*/
public class QRCodeUtil {
private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "JPG";
private static final int QRCODE_SIZE = 300; // 二维码尺寸，宽度和高度均是300
private static final int WIDTH = 80; //LOGO宽度
private static final int HEIGHT = 80; //LOGO高度
/**
* 生成二维码的方法
* @param content 目标url
* @param imgPath logo图片地址
* @param needCompress 是否压缩logo
* @return 二维码图片
* @throws Exception
*/
private static BufferedImage createImage(String content, String imgPath,boolean needCompress) throws Exception {
Hashtable hints = new Hashtable();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);//指定二维码的纠错等级为高级
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);//指定字符编码为“utf-8”
hints.put(EncodeHintType.MARGIN, 1); //设置图片的边距
//参数1：内容，目标url,参数2：固定写法，参数3：二维码的宽度，参数4：二维码的高度，参数5：二维码属性设置
BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
int width = bitMatrix.getWidth();//二维码的宽度
int height = bitMatrix.getHeight();//二维码的高度
BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);//生成的二维码image
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000: 0xFFFFFFFF);
}
}
if (imgPath == null || "".equals(imgPath)) {//logo图片地址为null或空时
return image; //只返回二维码图片，无中间的logo
}
// 插入logo图片 参数1：二维码图片，参数2：logo图片地址，参数3：压缩图片
QRCodeUtil.insertImage(image, imgPath, needCompress);
return image;
}
/**
* 插入logo图片
* @param source 二维码图片
* @param imgPath LOGO图片地址
* @param needCompress 是否压缩
* @throws Exception
*/
private static void insertImage(BufferedImage source, String imgPath,boolean needCompress) throws Exception {
File file = new File(imgPath);//logo图片地址放入文件
if (!file.exists()) {
System.err.println("" + imgPath + " 该文件不存在！");
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩LOGO
if (width > WIDTH) { //如果上传logo宽 >60
width = WIDTH;
}
if (height > HEIGHT) { //如果上传logo高>60
height = HEIGHT;
}
Image image = src.getScaledInstance(width, height,Image.SCALE_SMOOTH);
BufferedImage tag = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(image, 0, 0, null); // 绘制缩小后的图
g.dispose();
src = image;
}
// 插入LOGO
Graphics2D graph = source.createGraphics();
int x = (QRCODE_SIZE - width) / 2;
int y = (QRCODE_SIZE - height) / 2;
graph.drawImage(src, x, y, width, height, null);
Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
graph.setStroke(new BasicStroke(3f));
graph.draw(shape);
graph.dispose();
}
/**
* 生成二维码(内嵌LOGO)
* @param content 内容
* @param imgPath logo地址
* @param destPath 存放目录
* @param needCompress 是否压缩logo
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath,needCompress); //生成二维码
mkdirs(destPath);
String file = new Random().nextInt(99999) + ".jpg";
ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
}
/**
* 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
* @param destPath 存放目录
*/
public static void mkdirs(String destPath) {
File file = new File(destPath);
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}
/**
* 生成二维码(内嵌LOGO),没有压缩
*
* @param content 内容
* @param imgPath LOGO地址
* @param destPath 存储地址
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath)throws Exception {
QRCodeUtil.encode(content, imgPath, destPath, false);
}
/**
* 生成二维码，无内嵌logo
*
* @param content 内容
* @param destPath 存储地址
* @param needCompress 是否压缩LOGO
* @throws Exception
*/
public static void encode(String content, String destPath,boolean needCompress) throws Exception {
QRCodeUtil.encode(content, null, destPath, needCompress);
}
/**
* 生成二维码
*
* @param content 内容
* @param destPath 存储地址
* @throws Exception
*/
public static void encode(String content, String destPath) throws Exception {
QRCodeUtil.encode(content, null, destPath, false);
}
/**
* 生成二维码(内嵌LOGO)
*
* @param content 内容
* @param imgPath LOGO地址
* @param output 输出流
* @param needCompress 是否压缩LOGO
* @throws Exception
*/
public static void encode(String content, String imgPath,OutputStream output, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath,needCompress);
ImageIO.write(image, FORMAT_NAME, output);
}
/**
* 生成二维码
*
* @param content 内容
* @param output 输出流
* @throws Exception
*/
public static void encode(String content, OutputStream output)throws Exception {
QRCodeUtil.encode(content, null, output, false);
}
/**
* 解析二维码
* 按文件参数解析
* @param file 二维码图片
* @return
* @throws Exception
*/
public static String decode(File file) throws Exception {
BufferedImage image;
image = ImageIO.read(file);
if (image == null) {
return null;
}
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
Hashtable hints = new Hashtable();
hints.put(DecodeHintType.CHARACTER_SET, CHARSET);//指定字符编码为“utf-8”
result = new MultiFormatReader().decode(bitmap, hints);
String resultStr = result.getText();//二维码文本内容
return resultStr;
}
/**
* 解析二维码
* 按二维码图片地址解析
* @param path 二维码图片地址
* @return 不是二维码的内容返回null,是二维码直接返回识别的结果
* @throws Exception
*/
public static String decode(String path) throws Exception {
/**
* http://www.test.com/page/weizhi.html?devicesName=消防栓_WRbb&devicesNumber=2018092512094659f6aee7&hydrantId=d88219b0-c07e-11e8-87a3-2302a122c883
* &equipment=触发器01,撞到触发器;触发器02,开盖触发器;触发器03,漏水触发器;
*/
return QRCodeUtil.decode(new File(path));
}
}
main方法测试生成二维码
package com.common.qr.util;
public class QRTest {
public static void main(String[] args) {
//生成二维码
String content= "http://www.test.com/page/weizhi.html?devicesName=消防栓_WRbb&devicesNumber=2018092512094659f6aee7&hydrantId=d88219b0-c07e-11e8-87a3-2302a122c883&equipment=触发器01,撞到触发器;触发器02,开盖触发器;触发器03,漏水触发器;";
String imgPath="D:/upload/logo/logos.png";
String destPath ="D:/upload/zxing/";
System.out.println("logo图片地址imgPath=="+imgPath);
System.out.println("存放二维码图片的地址destPath=="+destPath);
try {
QRCodeUtil.encode(content,imgPath,destPath, true);
} catch (Exception e1) {
e1.printStackTrace();
}
//解析二维码
String destPath1 = "D:/upload/zxing/15456.jpg";
try {
String result = QRCodeUtil.decode(destPath1);
System.out.println(result);
}catch (Exception e){
e.printStackTrace();
System.out.println(destPath1+"不是二维码");
}
}
}
项目应用
/**
* 按消防栓主键查询出初始化数据，生成二维码
*/
@Override
public Integer insertQRCode(String hydrantId) {
//content= "http://www.zxhznkj.com/page/weizhi.html?fireplug=消防栓设备&number=消防栓编号&equipment=硬件01,触发器01;硬件02,触发器02;&hydrantId=1";
HydrantQRCodeEntity hydrantQRCodeEntity=hydrantQRCodeMapper.queryByIdHydrantQRCode(hydrantId);
String hydrantName=hydrantQRCodeEntity.getHydrantName();
String hydrantNumber=hydrantQRCodeEntity.getHydrantNumber();
List<HardwareQRCodeEntity> list=hardwareQRCodeMapper.queryByhydrantId(hydrantId);
String [] equipment=new String [list.size()];//创建字符数组,存放所有硬件设备
for(int i=0;i<list.size();i++){
HardwareQRCodeEntity hqrce=list.get(i);
String hardwareName=hqrce.getHardwareName();
String hardwareType=hqrce.getHardwareType();
String hardware=hardwareName+","+hardwareType+";";
equipment[i]=hardware; //取出的多个硬件存到数组中
}
//将字符串数组中的数据合并成一个字符串
String equipmentstr="";
StringBuffer sb = new StringBuffer();
for(int i=0;i<equipment.length;i++){
equipmentstr=sb.append(equipment[i]).toString();
}
String content="http://www.zxhznkj.com/page/weizhi.html?devicesName="+hydrantName+"&devicesNumber="+hydrantNumber+"&hydrantId="+hydrantId+"&equipment="+equipmentstr;
//调用生成二维码的接口，生成二维码
String imgPath="D:/upload/logo/logos.png"; //二维码logo
String destPath ="D:/upload/zxing/"; //生成二维码的地方
try {
QRCodeUtil.encode(content,imgPath,destPath, true);
} catch (Exception e) {
e.printStackTrace();
}
//修改二维码相关数据
hydrantQRCodeEntity.setQrCodeHost(content);
hydrantQRCodeEntity.setQrCodePicture(destPath);
hydrantQRCodeEntity.setQrCodeLogoimg(imgPath);
hydrantQRCodeEntity.setQrCodeStatus("未使用");
Integer iden=hydrantQRCodeMapper.updateHydrantQRCode(hydrantQRCodeEntity);
return iden;
}